Flush-tank siphon.



1. w. BERRY. FLUSH TANK SIPHON.

APPLICATION FILED APR. 17, I915.

Patented Feb. 22, 1916.

Zfyd

if y; t

Witnesses Attorneys THE COLUMBXA PLANOGRAPH co., WASHINGTON. n. c.

JAMES W. BERRY, OF IOWA CITY, IOWA.

FLUSH-TANK SIPHON.

Specification of Letters Patent.

Patented Feb. 22, 1%16.

Application filed April 17, 1915. Serial No. 22,168.

To all whom it may concern:

Be it known that I, JAMES W. BERRY, a citizen of the United States, residing at Iowa City, in the county of Johnson and State of Iowa, have invented a new and useful F lush-Tank Siphon, of which the following is a specification.

The present invention appertains to a siphon for flush'tanks, such as are used in sewage systems,,and the like, and aims to provide a novel and improved siphon adapted to be used within a tank for causing the Water to be automatically and intermittently discharged from the tank into the sewer or other conduit for flushing the same, the device being simple in construction, being inexpensively manufactured, and serving its oflice in a thoroughly practical and efficient manner.

\Vith the foregoing and other objects in proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed. can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein A Figure l'is a vertical section of the siphon as applied within a tank. Fig. 2 is a horizontal section ofthe siphon, taken on the line 22 of Fig. 1. In the drawing, the numeral 1 designates an ordinary flush tank, which is continually supplied with water through a supply pipe 2, which is normally openwhen the apparatus is in operation.

The present siphon embodies a base or bottom plate 3 which rests upon the floor or bottom of the tank 1, and which is provided with an upstanding sleeve 1, and a depending spout 5 in alinement and communieating with the sleeve 4: and connected to the sewer or conduit 6. The parts 3, 4 and 5 are integral and are preferably in the form of a casting. The siphon also embodies an upstanding or upright ring or annulus 7 which is provided at its lower edge with an outturned annular flange 8. seating upon the floor or bottom of the tank and the flange 8 may be embedded within mortar or may be otherwise secured to the floor or bottom of the tank for closing the space between the lower edge of the ring 7 and the floor of the tank. Thus, the base or bottom plate 3 need not extend to all of the walls of the ring 7, the base or bottom plate 8 being preferably elongated and having its ends secured to diametrically opposite portions of the flange 8, by means of bolts or other securing devices 9. The ring'Zis provided with a vertical chordal partition 10 between opposite sides thereof, and extending to the upper edge of the ring. The ring 7 is further provided with a top 11 between the upper edge of the partition 10 and the upper edge of the ring 7 at one side of the partition. The top 11 covers the greater portion of the space within the ring, and lies above the center of the ring. A chamber 12 is provided within the ring 7 under the top 11, and the space 13 between the partition 10 and remote wall of the ring 7 is open at its upper end. The lower edge of the partition 10 is spaced above the base or bottom plate 3 or the horizontal plane of the lower edge of the ring 7, to provide an opening 1% establishing communication between the lower portions of the chamber 12 and space or passage 13. The parts 7, 10 and 11 are preferably integral and in the form of a casting.

A bell or dome 15 is disposed over the ring 7, and is provided with an upper handle 16 for conveniently manipulating the bell. The rim or apron of the bell 15 is provided at one side and adjacent its lower edge with a vent aperture 17, and the top portion of the bell is provided with depending lugs 18 to seat upon the top 11 of the ring 7, for supporting the bell with the top and rim of the bell spaced from the ring 7. The lower edge of the bell 15 is spaced above the floor or bottom of the tank.

A relief trap 19, which as illustrated is of U-shape, has its bend engaged through the partition 10 adjacent its lower edge, and is provided with the upwardly projecting arm 20 within the space or passage 13, and with an upstanding arm 21 within the chamber 12. It is the function of the relief trap 19 to provide a secondary communication between the upper portion of the chamber 12 and the upper portions of the passage 13 and chamber 22 within the bell 15. Although a specific form of relief trap is illustrated, it is to be understood that various forms of relief traps may be provided for the same purpose.

The main trap of the siphon comprises the annular passage :23 between the rim of the bell 15 and the ring 7 wardly from the annular space or opening 24: between the lower edge of he bell and the floor or bottom of the tank, the passage 13 extending downwardly from the chamber to the opening H, the annular passage 25 between the sleeve and ring 7 extending upwardly from the opening 1% to the upper end of the sleeve i, and the downardly extending passage 26 within the sleeve 41 extending to and communicating with the sewer or conduit 6. Attention is directed to the fact that the arms 20 and 21 of the relief trap 19 are shorter than the passages of the main trap, especially the passage 13 thereof, whereby the relief trap will be discharged properly prior to the establishment of thesiphonic action.

In operation, before the tank is filled, and

when the device is started, the bell 15 is removed or lifted off of the ring 7, to enable the relief trap 19 and the passages 13 and to be filled with water for priming the device. The bell 15 is then reapplied, and the water is then turned on through the supply pipe :2 to fiow into and fill the tank 1. The water in flowing into the tank; will fill the tank gradually, and when the level of the water reachesto a predetermined height, known as the discharge line or level, the siphonic action is established for flushing the sewer or conduit 6. Thus, during the time that the tank 1 is. being filled with water, the water in rising upon the outer sides of the bell 15, will also rise within the annular passage 23, and in doing so will force the air within the chamber 232 within the bell into the passage 13 and relief trap arm 20. During the time that the water level is rising within the tank, the level of the water within the passage 13 and relief trap arm 20 is lowered, and when thelevel of the water within the relief trap 19 reaches the bend or lower portion of the relief trap, the air pressure will expel the water quickly from the other arm 21 of the relief trap, and this will allow the air within the chamber 22 and passage 13 to be discharged through the relief trap and passage 26. As a consequence, the water will rush quickly u y through the passage 23 and down the passage 13 into the passage 25, and thence down the passage 26. This will establish the siphonic action, causing the water to flow with a gushing action from the tank into the sewer or conduit for flushing out the sewer. After the water is discharged, or reaches a level below the lower edge of the bell, air will be admitted into the main trap, which will stop the siphonic action, and during the stopping of the siphonic action, the relief trap and passages 13 and will become sufliciently filled with water to, prevent the escape of air fromwithin the bell 15 during extending up the time that the tankis being filled up to thedi'scharge line. It is also to be noted that when the tank isemptied, the water level will be located adjacent the lower edge of the bell, and this might otherwise prevent air being admitted into the bell 15, if the vent aperture 17 were not employed; This vent aperture enables the air to how into the bell to fill the upper portion of the chamber 22. Then, when the tank is again filled, the siphonic action is repeated, so that during the continuance of the filling of the tank, the water will be discharged automatically and intermittently.

It is the duty of the relief trap 19 to permit the compressed air within'the bell to dischargeor blow the water out of the relief trapbeforethe level of the water within the passage 13 reaches the lower edge of the partition 10, whereby the air within "the chamber 22 and passage 13 is allowed to escape through the relief trap, to bring the siphonic action of the water into operation quickly. This siphonic action is stopped,

as soon as the siphon is broken by the air entering the bell when the water level reaches the lower edge of the bell.

The parts of the siphon may be readily manufactured and assembled, and

present siphon embodies but a few simple parts, and none of the. parts are required to move in the operation of the device. The lower end of the ring 7 may be cemented or tom of the tank, for preventing leakage under the ring 7, the other advantages and capabilities of the present structure are partition across the same and a top between,-

the partition and ring at one side of the partition, there being a chamber within the ring below the top, and a passage at the opposite side of the partition having its upper end open, the lower edge of the partition being spaced above the plane of the lower edge of thering to provide an opening establishing communication between the lower portions of said passage and chamber, a bell mounted over the ring, there being an outlet portion. extending downwardly from the upper portion of the said chamber, and a relief trap establishing communication between the upper portion of the said chamber and the chamber within the bell.

2. In a siphon,an uprightring having a vertical chordal partition and a top between the upper edges of the partition and ring over the center of the ring and providing the otherwise attached upon the floor or botizo a chamber at one side of the said partition,

there being a passage at the other side ofthe 1 partition and having its upper end open, the munication between said chamber and the 10 a communication between the lower portions ture in the presence of two witnesses.

of the said passage and the chamber, a bell JAMES W. BERRY. mounted over the ring, an upstanding sleeve Witnesses: within said chamber providing an outlet C. M. BERRY,

- passage, and a relief trap establishing com- L. B. SMITH.

" Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

lower edge of thepartition being spaced chamber'within the bell. above the plane of the lower edge of the In testimony that I claim the foregoing ring to provide an opening establishing as my own, I have hereto affixed my signa- Washington, D. G. 

